PRTG Manual: Port Range Sensor

SRP ciphers

This sensor does not support Secure Remote Password (SRP) ciphers.

IPv6

This sensor supports IPv6.

Performance impact

This sensor has a very low performance impact.

Hosted probe

You cannot add this sensor to the hosted probe of a PRTG Hosted Monitor instance. If you want to use this sensor, add it to a remote probe device.

Timeout (Sec.)

Enter a timeout in seconds for the request. Enter an integer. The maximum timeout value is 900 seconds (15 minutes).

If the reply takes longer than this value, the sensor cancels the request and shows a corresponding error message.

Port-by-Port Delay (ms)

Define how long the sensor waits in milliseconds (ms) to go to the next port while it runs through all specified ports.

Port Range Selection Method

Define whether you want to monitor all ports within a range or if you want to monitor several individual ports:

• Port range: Monitor ports within a range.
• List of ports: Monitor several individual ports.

Range Start

This setting is only visible if you select Port range above.

Enter the port number where the scan starts. Enter an integer.

Range End

This setting is only visible if you select Port range above.

Enter the port number where the scan ends. Enter an integer.

Port List

This setting is only visible if you select List of ports above.

Enter the numbers of the ports that the sensor tries to connect to. Enter one or more individual integers. Enter each port in one line.

If Value Changes

Define what the sensor does if the number of closed ports or open ports changes:

• Ignore (default): Do nothing.
• Trigger 'change' notification: Send an internal message that indicates a change.
  In combination with a change trigger, you can use this to trigger a notification if a change occurs.

Primary Channel

Select a channel from the list to define it as the primary channel. In the device tree, PRTG displays the last value of the primary channel below the sensor's name. The available options depend on what channels are available for this sensor.

You can set a different primary channel later by clicking below a channel gauge on the sensor's Overview tab.

Graph Type

Define how this sensor shows different channels:

• Show channels independently (default): Show a graph for each channel.
• Stack channels on top of each other: Stack channels on top of each other to create a multi-channel graph. This generates a graph that visualizes the different components of your total traffic.
  You cannot use this option in combination with manual Vertical Axis Scaling (available in the channel settings).

Stack Unit

This setting is only visible if you select Stack channels on top of each other above.

Select a unit from the list. PRTG stacks all channels with this unit on top of each other. By default, you cannot exclude single channels from stacking if they use the selected unit. However, there is an advanced procedure to do so.

Available

The time until requests to ports are accepted

This channel is the primary channel by default.

Closed Ports

The number of closed ports

Downtime

In the channel table on the Overview tab, this channel never shows any values. PRTG uses this channel in graphs and reports to show the amount of time in which the sensor was in the Down status

Open Ports

The number of open ports